20619340799 has 2 divisors, whose sum is σ = 20619340800. Its totient is φ = 20619340798.

The previous prime is 20619340751. The next prime is 20619340801. The reversal of 20619340799 is 99704391602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20619340799 is a prime.

Together with 20619340801, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20619340739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10309670399 + 10309670400.

It is an arithmetic number, because the mean of its divisors is an integer number (10309670400).

Almost surely, 2^20619340799 is an apocalyptic number.

20619340799 is a deficient number, since it is larger than the sum of its proper divisors (1).

20619340799 is an equidigital number, since it uses as much as digits as its factorization.

20619340799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 50.

The spelling of 20619340799 in words is "twenty billion, six hundred nineteen million, three hundred forty thousand, seven hundred ninety-nine".